function openPopUp(url, i_hi, i_wi, i_top) {
	i_screenWidth = screen.width;
	i_screenHeight = screen.height;
	if((i_hi == '') || (i_hi == 0) || (i_hi == 'undefined')) {
		i_winHeight = 570;
	}
	else {
		i_winHeight = i_hi;
	}	
	if((i_wi == '') || (i_wi == 0) || (i_wi == 'undefined')) {
		i_winWidth = 770;
	}
	else {
		i_winWidth = i_wi;
	}	
	if((i_top == '') || (i_top == 0) || (i_top == 'undefined')) {
		i_top = 1;
	}
	else {
		i_top = i_top;
	}	
	i_left = (i_screenWidth-i_winWidth)/2;				
	w_child = window.open(url, "_blank", "scrollbars,height=" + i_winHeight + ",width=" + i_winWidth + ",top=" + i_top + ",left=" + i_left + ",resizable=1,scrollbars=no,titlebar=0,status=no");
	//w_child.focus;
	return;
}