var classNames = new Array( 'middletd','resizetxt');
var pixelArray =  new Array('8','10','11','12','13','14','16','18','20','22');
var emArray =  new Array('0.6','0.7','0.8','0.9','1.0','1.2','1.4','1.6','1.8','2.0');
var initSize = 5;


function fontSizer(inc,unit) {
	if (!document.getElementById) 
		return;
	var size = initSize;
	size += inc;
	if (size < 0 ) { size = 0; }
	if (size > 10 ) { size = 10; }
	initSize = size;
	for (i = 0 ; i < classNames.length ; i++ ) {
	  getallTags = $('.'+classNames[i]);
		for (k = 0 ; k < getallTags.length ; k++) {
		  getallTags[k].style.fontSize = (unit=='px') ? pixelArray[size]+unit: emArray[size]+unit;
		}
	}
}