var ddequalcolumns=new Object() 
ddequalcolumns.columnswatch=["blok1", "blok2", "blok3"] 
ddequalcolumns.setHeights=function(reset){ 
var tallest=0 
var resetit=(typeof reset=="string")? true : false 
for (var i=0; i<this.columnswatch.length; i++){ 
if (document.getElementById(this.columnswatch[i])!=null){ 
if (resetit) 
document.getElementById(this.columnswatch[i]).style.height="auto" 
if (document.getElementById(this.columnswatch[i]).offsetHeight>tallest) 
tallest=document.getElementById(this.columnswatch[i]).offsetHeight 
} 
} 
if (tallest>0){ 
for (var i=0; i<this.columnswatch.length; i++){ 
if (document.getElementById(this.columnswatch[i])!=null) 
document.getElementById(this.columnswatch[i]).style.height=tallest+"px" 
} 
} 
} 

ddequalcolumns.resetHeights=function(){ 
this.setHeights("reset") 
} 
ddequalcolumns.dotask=function(target, functionref, tasktype){ 
var tasktype=(window.addEventListener)? tasktype : "on"+tasktype 
if (target.addEventListener) 
target.addEventListener(tasktype, functionref, false) 
else if (target.attachEvent) 
target.attachEvent(tasktype, functionref) 

} 
ddequalcolumns.dotask(window, function(){ddequalcolumns.setHeights()}, "load") 
ddequalcolumns.dotask(window, function(){if (typeof ddequalcolumns.timer!="undefined") clearTimeout(ddequalcolumns.timer); ddequalcolumns.timer=setTimeout("ddequalcolumns.resetHeights()", 200)}, "resize")