function get_divcount(){
	var div = document.getElementsByTagName('div');
		var rows=0;
		var cols=0;
		for(var i=0;i<div.length;i++){
			if (div[i].id.indexOf('div_')!=-1){
				var trgt=div[i].id;
				// get higest row
				if (trgt.substring(4,5)>rows){
					rows=trgt.substring(4,5)
				}
				// get higest col
				if (trgt.substring(5,6)>cols){
					cols=trgt.substring(5,6)
				}						
			}
		}
	return [rows,cols];
}

function get_divgrid(){
	alert(get_divcount())
	var divarray= new Array ([get_divcount()[0]]);
	alert(divarray.tostring);
}

function lineup(wsp){ // lineupp all div_xx in body
		// get all divs contain 'div_'
		var divs = get_divcount();
		rows=parseInt(divs[0]); // horisontal div count
		cols=parseInt(divs[1]); // vertical divs count
		if(!wsp){
			wsp=1
		}
		wspacedivider=wsp;
		hspacedivider=4;
		// useable body space
		var body=document.getElementById('body');
		var useableheight=body.parentElement.offsetHeight;
		var useablewidth=body.offsetWidth;
		var widthdiv=useablewidth/(cols+1);
		var heightdiv=useableheight/(rows+1);
		var wdivspace=widthdiv/(cols+wspacedivider)
		var hdivspace=20;//heightdiv/(rows+hspacedivider)
		var leftstart=0;
		var topstart=0;
		var divheight=0;
		for(r=1;r<=rows;r++){
			leftstart=0;
			for(c=1;c<=cols;c++){
				divid='div_'+r+''+c+'';
				div=document.getElementById(divid);
				if (div){
					div.style.display="block";
					// set divwspacing and div width
					div.style.width=widthdiv+'px';
					div.style.left=(leftstart+wdivspace)+'px';
					leftstart=leftstart+div.offsetWidth+wdivspace;
					// set divhspacing and div width
					if (div.offsetHeight>divheight){
					divheight=div.offsetHeight
					}
					div.style.top=(topstart+hdivspace)+'px';
				}	
				if (c==cols){
					topstart=topstart+divheight+hdivspace;
				}
			}
		}
}