var checkIdPostfix="_chck";var checkedCls="checkbox-checked-image";var uncheckedCls="checkbox-unchecked-image";window.addEvent("domready",function(){var a=$(document.body).getElements("div");for(i=0;i<a.length;i++){if(a[i].className==checkedCls||a[i].className==uncheckedCls){a[i].addEvents({click:function(){if(checkedCls==this.className){document.getElementById(this.id+checkIdPostfix).checked=false;this.className=uncheckedCls}else{document.getElementById(this.id+checkIdPostfix).checked=true;this.className=checkedCls}}})}}});