function heighter ()
	{
	var left=document.getElementById('left_heighter').offsetHeight;
	var center=document.getElementById('center_heighter').offsetHeight;
	var right=document.getElementById('right_heighter').offsetHeight;
	
	if(left>right && left>center){document.getElementById('right_heighter').style.height=left+'px';document.getElementById('center_heighter').style.height=left+'px'}
	if(right>left && right>center){document.getElementById('left_heighter').style.height=right+'px';document.getElementById('center_heighter').style.height=right+'px'}
	if(center>right && center>left){document.getElementById('left_heighter').style.height=center+'px';document.getElementById('right_heighter').style.height=center+'px'}
	}
window.onload=heighter;