{

var a = document . getelementbyid(" test input ")。 Value; //Get the value of the text box

If (flange & amp & oper! Do nothing when the = "=" {}//operator is not =

Else // When clicked =

{

flang = true

If('+'==oper) // operator is+.

{

total = parse float(total)+pares float(a)； //The last saved value plus the value of the text box should add up to the one I explained in my last question.

}

Else if('-'==oper){ // followed by-*/Tongli.

total-= a；

}

else if('*'==oper){

total * = a；

}

else if('/'==oper){

total/= a；

}

other

{

Total = a；;

}

document . getelementbyid(" test input ")。 Value = total; //Then put the operation result into the text box.

oper = v； //operator flag redistribution

}

}

The whole method is that when you click =, the last saved input value (understood as dividend is subtracted, etc.) is operated with the second input value.