function to_color_table(){
	var tables = document.getElementsByTagName("table");
	for (j = 0; j < tables.length; j++) {
		if(tables[j].className == "color_table"){
			tables[j].cellPadding="1";
			tables[j].cellSpacing="1";
			tables[j].style.border="0";
			var rows = tables[j].getElementsByTagName("tr");  
			for(i = 0; i < rows.length; i++){          
				if(i % 2 == 0){
					rows[i].className = "rowcolor1";
				}else{
					rows[i].className = "rowcolor2";
				}
				var tds = rows[i].getElementsByTagName("td"); 
				for(k = 0; k < tds.length; k++){
				var num=k+1;
				tds[k].className='col_'+num;
				}
			}
		}
		if(tables[j].className == "color_table2"){
			tables[j].cellPadding="1";
			tables[j].cellSpacing="1";
			tables[j].style.border="0";
		}
		if(tables[j].className == "color_table3"){
			tables[j].cellPadding="1";
			tables[j].cellSpacing="1";
			tables[j].style.border="0";
			var rows = tables[j].getElementsByTagName("tr");  
			for(i = 0; i < rows.length; i++){          
				if(i % 2 == 0){
					rows[i].className = "rowcolor1";
				}else{
					rows[i].className = "rowcolor2";
				}
				var tds = rows[i].getElementsByTagName("td"); 
				for(k = 0; k < tds.length; k++){
				var num=k+1;
				tds[k].className='col_'+num;
				}
			}
		}
	}
}