function button1_onclick() {
var courses;
FORM1.text6.value = eval(FORM1.text1.value);//Length of all walls (Perim)
FORM1.text6.value = eval(FORM1.text6.value)+4;//Perim+Overhang, Total Linear Feet per Course
courses = (eval(FORM1.text4.value)*2.23);//Height*course multiplier = # of courses
FORM1.text6.value = eval(courses)*eval(FORM1.text6.value);//Linear feet*courses
FORM1.text6.value = Math.round(FORM1.text6.value*100)/100;
FORM1.txtCost.value = eval(FORM1.selectCost.value)*eval(FORM1.text6.value);//cost per foot*total feet
FORM1.txtCost.value = "$"+Math.round(FORM1.txtCost.value*100)/100;
}