Member Avatar for jaycastr

I have a textarea where i want the user to just enter the values: $x $y $z $a $b $c (,),+,-,*,/ ^

Here what i have so far

Formula
    <textarea name="formula" onkeyup="check(this.value)" ></textarea>

javascript

function check(formula) {
    ????
			

		}

Thanks in advanced

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  • Latest Post Latest Post by crishlay
Member Avatar for crishlay

make regular expression which is allowed only this kind of charaters and then validate it

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