$(function() {
//regel 1
	var row1=new Array("#bloktype4_1","#bloktype4_2","#bloktype4_3","#bloktype1_1"); 
	//regel 2
	var row2=new Array("#bloktype4_4","#bloktype4_5","#bloktype4_6","#bloktype1_2"); 
	//regel 3
	var row3=new Array("#bloktype4_7","#bloktype4_8","#bloktype4_9","#bloktype1_3"); 

	
	
	var arrayRows=new Array(row1, row2, row3);
	var arrayRowsMaxHeight=new Array(0, 0, 0);
	
	// step 1: find biggest height per row
	
	// loop rows
	for(i=0; i<arrayRows.length; i++) { 
		// loop items per row
		for(c=0; c<=arrayRows.length; c++) { 
			if ($(arrayRows[i][c]).height() > arrayRowsMaxHeight[i]) {
				arrayRowsMaxHeight[i] = $(arrayRows[i][c]).height();
			}
		}
	}

	// step 2: set same height per row
	
	// loop rows
	
	for(i=0; i<arrayRows.length; i++) { 
		// loop items per row
		for(c=0; c<=arrayRows.length; c++) { 
			$(arrayRows[i][c]).height(arrayRowsMaxHeight[i]);
			$(arrayRows[i][c]+ " .text").height(arrayRowsMaxHeight[i]-55);
		}
	}
	
});