is this correct syntax to create onclick event on dynamic html document

Question

 var val1=document.createElement("input");
 val1.setAttribute('type',"image");
 val1.setAttribute('src',"../images/delete.gif");
 val1.setAttribute('id',chkid);
 val1.setAttribute('name',"val2");
 val1.setAttribute('class',"mylist2");
 val1.onclick=function(){var block=document.getElementById("repeat_ul");
 var obj=document.getElementById('country_chk');
 document.block.removeChild(obj);};