function setButImg(id,url){var idArr=id.split("_");document.getElementById(id).src="/main/images/buttons/"+idArr[0]+url;}var cNo=0;var cache=new Array();function setButEvent(id){var obj=document.getElementById(id);cache[cNo]=new Image();cache[cNo++].src="/main/images/buttons/"+id+"_hover."+picExt;cache[cNo]=new Image();cache[cNo++].src="/main/images/buttons/"+id+"_down."+picExt;obj.onmouseover=new Function("setButImg('"+id+"', '_hover."+picExt+"')");obj.onmouseout=new Function("setButImg('"+id+"', '_up."+picExt+"')");obj.onmousedown=new Function("setButImg('"+id+"', '_down."+picExt+"')");obj.onmouseup=new Function("setButImg('"+id+"', '_hover."+picExt+"')");}