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This will show how to use form inputs to perform math functions.
Head Code:
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<script> function domath() { var _f=document.forms[0]; /* assume only one form on this page */ var _s=""; _s+="item1='"+_f.item1.value+"'n"; var _temp=parseFloat("0."+_f.item1.value); _s+="item1NEW='"+_temp+"'n"; _s+="item2='"+_f.item2.value+"'n"; _f.item3.value=_temp*_f.item2.value; _s+="item3='"+_f.item3.value+"'n"; _f.test.value=_s; } </script> |
Body Code:
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<form> <table> <tr><td> 0.</td><td><input type=text name=item1 value="5"></td></tr> <tr><td>x</td><td><input type=text name=item2 value="22222"></td></tr> <tr><td>=</td><td><input type=text name=item3 value="" readonly onfocus=blur()></td></tr> <tr><td colspan=2 align=center><input type=button value="compute" onclick="domath()"></td></tr> <tr><td colspan=2 align=center><textarea rows=5 cols=80 name=test></textarea></td></tr> </table> </form> |
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