Use Below script on change of field value

This script will help you to restrict end user to provide currency value in "$0.00" format

function onChange(control, oldValue, newValue, isLoading) {

if (isLoading || newValue == '') {

return;

}

//Type appropriate comment here, and begin script below

var cost_field = g_form.getValue('cost_field');

cost_field = cost_field.trim();

// first character should be dollar sign

var firstChar = cost_field.substring(0, 1);

if (firstChar != '$' || firstChar != 'second' || firstChar != 'third') {

alert("Please enter cost_field in $0.00 format along with the currency symbol");

g_form.setValue("cost_field", oldValue);

return;

}

// characters after the $ sign should be numerics

var cost_fieldType = isNaN(cost_field.substring(1));

if (cost_fieldType == true) {

alert("Please enter cost_field in $0.00 format along with the currency symbol");

g_form.setValue("cost_field", oldValue);

return;

}

// entered value should have a decimal point

var num = cost_field.substring(1);

if (num.indexOf('.') == -1) {

alert("Please enter cost_field in $0.00 format along with the currency symbol");

g_form.setValue("cost_field", oldValue);

return;

}

// there must be 2 digits only after the decimal

var decNum = num.substring(num.indexOf('.') + 1, num.length);

if (decNum.length != 2) {

alert("Please enter cost_field in $0.00 format along with the currency symbol");

g_form.setValue("cost_field", oldValue);

return;

}

}

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