Drag and Resize Div in Javascript

Create file "drag_resize.js" call within the page

//DRAG AND RESIZE DIV SCRIPT=====================================================================

<script type="text/javascript">if(typeof addEvent!='function'){var addEvent=function(o,t,f,l){var d='addEventListener',n='on'+t,rO=o,rT=t,rF=f,rL=l;if(o[d]&&!l)return o[d](t,f,false);if(!o._evts)o._evts={};if(!o._evts[t]){o._evts[t]=o[n]?{b:o[n]}:{};o[n]=new Function('e','var r=true,o=this,a=o._evts["'+t+'"],i;for(i in a){o._f=a[i];r=o._f(e||window.event)!=false&&r;o._f=null}return r');if(t!='unload')addEvent(window,'unload',function(){removeEvent(rO,rT,rF,rL)})}if(!f._i)f._i=addEvent._i++;o._evts[t][f._i]=f};addEvent._i=1;var removeEvent=function(o,t,f,l){var d='removeEventListener';if(o[d]&&!l)return o[d](t,f,false);if(o._evts&&o._evts[t]&&f._i)delete o._evts[t][f._i]}}function cancelEvent(e,c){e.returnValue=false;if(e.preventDefault)e.preventDefault();if(c){e.cancelBubble=true;if(e.stopPropagation)e.stopPropagation()}};function DragResize(myName,config){var props={myName:myName,enabled:true,handles:['tl','tm','tr','ml','mr','bl','bm','br'],isElement:null,isHandle:null,element:null,handle:null,minWidth:10,minHeight:10,minLeft:0,maxLeft:9999,minTop:0,maxTop:9999,zIndex:1,mouseX:0,mouseY:0,lastMouseX:0,lastMouseY:0,mOffX:0,mOffY:0,elmX:0,elmY:0,elmW:0,elmH:0,allowBlur:true,ondragfocus:null,ondragstart:null,ondragmove:null,ondragend:null,ondragblur:null};for(var p in props)this[p]=(typeof config[p]=='undefined')?props[p]:config[p]};DragResize.prototype.apply=function(node){var obj=this;addEvent(node,'mousedown',function(e){obj.mouseDown(e)});addEvent(node,'mousemove',function(e){obj.mouseMove(e)});addEvent(node,'mouseup',function(e){obj.mouseUp(e)})};DragResize.prototype.select=function(newElement){with(this){if(!document.getElementById||!enabled)return;if(newElement&&(newElement!=element)&&enabled){element=newElement;element.style.zIndex=++zIndex;if(this.resizeHandleSet)this.resizeHandleSet(element,true);elmX=parseInt(element.style.left);elmY=parseInt(element.style.top);elmW=element.offsetWidth;elmH=element.offsetHeight;if(ondragfocus)this.ondragfocus()}}};DragResize.prototype.deselect=function(delHandles){with(this){if(!document.getElementById||!enabled)return;if(delHandles){if(ondragblur)this.ondragblur();if(this.resizeHandleSet)this.resizeHandleSet(element,false);element=null}handle=null;mOffX=0;mOffY=0}};DragResize.prototype.mouseDown=function(e){with(this){if(!document.getElementById||!enabled)return true;var elm=e.target||e.srcElement,newElement=null,newHandle=null,hRE=new RegExp(myName+'-([trmbl]{2})','');while(elm){if(elm.className){if(!newHandle&&(hRE.test(elm.className)||isHandle(elm)))newHandle=elm;if(isElement(elm)){newElement=elm;break}}elm=elm.parentNode}if(element&&(element!=newElement)&&allowBlur)deselect(true);if(newElement&&(!element||(newElement==element))){if(newHandle)cancelEvent(e);select(newElement,newHandle);handle=newHandle;if(handle&&ondragstart)this.ondragstart(hRE.test(handle.className))}}};DragResize.prototype.mouseMove=function(e){with(this){if(!document.getElementById||!enabled)return true;mouseX=e.pageX||e.clientX+document.documentElement.scrollLeft;mouseY=e.pageY||e.clientY+document.documentElement.scrollTop;var diffX=mouseX-lastMouseX+mOffX;var diffY=mouseY-lastMouseY+mOffY;mOffX=mOffY=0;lastMouseX=mouseX;lastMouseY=mouseY;if(!handle)return true;var isResize=false;if(this.resizeHandleDrag&&this.resizeHandleDrag(diffX,diffY)){isResize=true}else{var dX=diffX,dY=diffY;if(elmX+dX<minLeft)mOffX=(dX-(diffX=minLeft-elmX));else if(elmX+elmW+dX>maxLeft)mOffX=(dX-(diffX=maxLeft-elmX-elmW));if(elmY+dY<minTop)mOffY=(dY-(diffY=minTop-elmY));else if(elmY+elmH+dY>maxTop)mOffY=(dY-(diffY=maxTop-elmY-elmH));elmX+=diffX;elmY+=diffY}with(element.style){left=elmX+'px';width=elmW+'px';top=elmY+'px';height=elmH+'px'}if(window.opera&&document.documentElement){var oDF=document.getElementById('op-drag-fix');if(!oDF){var oDF=document.createElement('input');oDF.id='op-drag-fix';oDF.style.display='none';document.body.appendChild(oDF)}oDF.focus()}if(ondragmove)this.ondragmove(isResize);cancelEvent(e)}};DragResize.prototype.mouseUp=function(e){with(this){if(!document.getElementById||!enabled)return;var hRE=new RegExp(myName+'-([trmbl]{2})','');if(handle&&ondragend)this.ondragend(hRE.test(handle.className));deselect(false)}};DragResize.prototype.resizeHandleSet=function(elm,show){with(this){if(!elm._handle_tr){for(var h=0;h<handles.length;h++){var hDiv=document.createElement('div');hDiv.className=myName+' '+myName+'-'+handles[h];elm['_handle_'+handles[h]]=elm.appendChild(hDiv)}}for(var h=0;h<handles.length;h++){elm['_handle_'+handles[h]].style.visibility=show?'inherit':'hidden'}}};DragResize.prototype.resizeHandleDrag=function(diffX,diffY){    setBgcolor();    with(this){var hClass=handle&&handle.className&&handle.className.match(new RegExp(myName+'-([tmblr]{2})'))?RegExp.$1:'';var dY=diffY,dX=diffX,processed=false;if(hClass.indexOf('t')>=0){rs=1;if(elmH-dY<minHeight)mOffY=(dY-(diffY=elmH-minHeight));else if(elmY+dY<minTop)mOffY=(dY-(diffY=minTop-elmY));elmY+=diffY;elmH-=diffY;processed=true}if(hClass.indexOf('b')>=0){rs=1;if(elmH+dY<minHeight)mOffY=(dY-(diffY=minHeight-elmH));else if(elmY+elmH+dY>maxTop)mOffY=(dY-(diffY=maxTop-elmY-elmH));elmH+=diffY;processed=true}if(hClass.indexOf('l')>=0){rs=1;if(elmW-dX<minWidth)mOffX=(dX-(diffX=elmW-minWidth));else if(elmX+dX<minLeft)mOffX=(dX-(diffX=minLeft-elmX));elmX+=diffX;elmW-=diffX;processed=true}if(hClass.indexOf('r')>=0){rs=1;if(elmW+dX<minWidth)mOffX=(dX-(diffX=minWidth-elmW));else if(elmX+elmW+dX>maxLeft)mOffX=(dX-(diffX=maxLeft-elmX-elmW));elmW+=diffX;processed=true}return processed}};</script>

Place this script within the page header

<script type="text/javascript"><br />
var dragresize = new DragResize('dragresize',<br />
 { minWidth: 50, minHeight: 50, minLeft: 20, minTop: 20, maxLeft: 800, maxTop: 600 });<br />
dragresize.isElement = function(elm)<br />
{<br />
    if (elm.className && elm.className.indexOf('drsElement') > -1) return true;<br />
};<br />
dragresize.isHandle = function(elm)<br />
{<br />
 if (elm.className && elm.className.indexOf('drsMoveHandle') > -1) return true;<br />
};<br />
dragresize.ondragfocus = function() { };<br />
dragresize.ondragstart = function(isResize) { };<br />
dragresize.ondragmove = function(isResize) { };<br />
dragresize.ondragend = function(isResize) { };<br />
dragresize.ondragblur = function() { };<br />
dragresize.apply(document);<br />
</script>

Place this div with the page .

<div class="drsElement" id="div_drag1" style="width: 350px; height: 180px; background: #CDF; text-align: center;position: relative; padding:5px;font-family:Verdana, Geneva, sans-serif;font-size:11px;font-weight:bold;"  ><br />
<div >Message </div><br />
</div>

Thowfeek M. Khan

Drag and Resize Div in Javascript