<script>

var concernedLayers=new Array()
concernedLayers[0]=new Array("aName",425,160)
concernedLayers[1]=new Array("bName",415,380)
concernedLayers[2]=new Array("cName",290,285)
concernedLayers[3]=new Array("dName",310,285)
concernedLayers[4]=new Array("eName",305,290)
concernedLayers[5]=new Array("fName",635,545)
//syntax is: entry[x]=new Array(LAYERName, its_WIDTH, its_HEIGHT)
//you can go on with indexes [1], [2]...
var engagedZindex=0;
var engaged=null;

//DOM detected build up:
if(document.getElementById){
obj1="document.getElementById('"
obj2="')"
style=".style"
eX=(navigator.appName.indexOf("Internet Explorer")==-1)?
"e.clientX":"event.clientX";
eY=(navigator.appName.indexOf("Internet Explorer")==-1)?
"e.clientY":"event.clientY";
offsetX=(navigator.appName.indexOf("Internet Explorer")==-1)?
"pageXOffset":"document.body.scrollLeft"
offsetY=(navigator.appName.indexOf("Internet Explorer")==-1)?
"pageYOffset":"document.body.scrollTop"
}
else if(document.all){
obj1="document.all['"
obj2="']"
style=".style"
eX="event.clientX"
eY="event.clientY"
offsetX="document.body.scrollLeft"
offsetY="document.body.scrollTop"
}
else if(document.layers){
obj1="document.layers['"
obj2="']"
style=""
eX="e.pageX"
eY="e.pageY"
offsetX="pageXOffset"
offsetY="pageYOffset"
document.captureEvents(Event.MOUSEDOWN|Event.MOUSEMOVE|Event.MOUSEUP)
}
//DOM build up now over

function events(e){//argument must be set as e 
var Xin=eval(eX)
var Yin=eval(eY)
/*thanks to Dynamic HTML by Danny Goodman for
settings of following looping idea*/
for(var i=0;i < concernedLayers.length;i++){
var OGG=eval(obj1+concernedLayers[i][0]+obj2+style);
//is it visible?:
var visib=OGG.visibility
if(visib=="hidden"||
visib=="hide"){continue}
var layerW=concernedLayers[i][1]
var layerH=concernedLayers[i][2]
var L=parseFloat(OGG.left);//parseFloat: could carry a trailing "px" !
var T=parseFloat(OGG.top)
var offX=(document.layers)?0:eval(offsetX);//in case you scrolled
var offY=(document.layers)?0:eval(offsetY)
if(
Xin>(L-offX)&&Xin < (L-offX+layerW)&&
Yin>(T-offY)&&Yin < (T-offY+layerH))
{engaged=i;
moveX=Xin-L
moveY=Yin-T
engagedZindex=OGG.zIndex
setIndex(concernedLayers[i][0])
return}
}
engaged=null
/*keep this comment to reuse freely
http://www.unitedscripters.com */}

function setIndex(theLayer,how){
var OGG=eval(obj1+theLayer+obj2+style)
OGG.zIndex=(how)?how:101;
}

function disengage(){
if(engaged==null){return false}
setIndex(concernedLayers[engaged][0],engagedZindex)
moveX=null;
moveY=null;
engaged=null;
}

function dragLayer(e){
if(engaged==null){return false}
var Xin=eval(eX)
var Yin=eval(eY)
var OGG=eval(obj1+ concernedLayers[engaged][0]+ obj2+ style)
//now move it
OGG.top=Yin-moveY
OGG.left=Xin-moveX
/*keep this comment to reuse freely
http://www.unitedscripters.com */
}

document.onmousedown=events
document.onmousemove=dragLayer
document.onmouseup=disengage

</script>