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function selectAll() { for(i=0;i<document.forms[0].elements.length;i++) { var e = document.forms[0].elements[i]; if(e.type == 'checkbox') { e.checked = true; } } } function unSelectAll() { for(i=0;i<document.forms[0].elements.length;i++) { var e = document.forms[0].elements[i]; if(e.type == 'checkbox') { e.checked = false; } } }