function chg(it){
	var objTab = it.parentNode.parentNode.parentNode;
	var flag=false;
	for(var i=0;i<objTab.rows[0].cells.length;i++){
		var td = objTab.rows[0].cells[i];
		if(it==td){
				it.className = it.className.replace("nav_off","nav_on");
				eval("default_ul"+i+".style.display='';");
		}
		else{
				td.className = td.className.replace("nav_on","nav_off");
				eval("default_ul"+i+".style.display='none';");
		}

	}
}


function chgcolor(it){
	it.className = "text4";
	it.value='';
}


function chg1(id){
	searchform.PCert.value=id;
}