function adjust(){
	var total_width=$("#main_cnr").width();
	var lft_width=$("#body_cnr .col_1").width();
	//var rgt_width=$("#body_cnr .col_3").width();
	rgt_width=180;
	mid_width =total_width - (lft_width+rgt_width)-42;
	$("#body_cnr .col_2").css("width",mid_width);
	
}