Soma Automatica De Campos Em Html
Started By marc_guga, 21/11/2005, 12:32
11 replies to this topic
#1
Posted 21/11/2005, 12:32
Boa tarde pessoal, estou começando agora com programação HTML+ASP
preciso de ajuda:
preciso fazer um form com três campos de texto (campo1 , campo2, campo3)
de modo que o usuario jogue o valor no campo1 e no campo2 e a pagina calcular
automaticamente o campo3 quando perder o foco do campo2...
agradeço desde já a possivel ajuda
Marcelo
preciso de ajuda:
preciso fazer um form com três campos de texto (campo1 , campo2, campo3)
de modo que o usuario jogue o valor no campo1 e no campo2 e a pagina calcular
automaticamente o campo3 quando perder o foco do campo2...
agradeço desde já a possivel ajuda
Marcelo
- BobbyCak likes this
#2
Posted 21/11/2005, 23:06
Primeiro vc deve criar os camps
Vc quer que, ao sair do segundo campo, ele some o campo1 e o campo2.. e o resultado é mostrado no campo3. .
Para somar é facil, é igual matemática.. com o mais + . Para pegar o valor do campo um, vamos usar
Ah.. lembrando, para fazer isso funcionar, precisamos usar o evento onblur.. ele vai ser responsavel na por fazer a soma funcionar quando o campo perder o foco . .
<input type="text" id="campo1" /> <input type="text" id="campo2" /> <input type="text" id="campo3" />Dei um id para cada campo, vamos usar eles para pegar o valor de cada campo..
Vc quer que, ao sair do segundo campo, ele some o campo1 e o campo2.. e o resultado é mostrado no campo3. .
Para somar é facil, é igual matemática.. com o mais + . Para pegar o valor do campo um, vamos usar
Para enviar o valor para o campo3, usamos a mesma coisa, vc só precisa mudar o id (a parte em negrito). . Então, fazendo a soma e enviando para o outro campo:document.getElementById('campo1').value
document.getElementById('campo3').value=document.getElementById('campo1').value+this.valueEssa linha vai enviar para o campo 3 o resultado da soma do campo 1 e 2. . repare que usei this.value para pegar o campo2.. isso pq essa linha vai ficar no campo2. .
Ah.. lembrando, para fazer isso funcionar, precisamos usar o evento onblur.. ele vai ser responsavel na por fazer a soma funcionar quando o campo perder o foco . .
<input type="text" id="campo1" /> <input type="text" id="campo2" onblur="document.getElementById('campo3').value=document.getElementById('campo1').value+this.value"/> <input type="text" id="campo3" />
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#3
Posted 30/11/2005, 09:01
Cara, muito obrigado pela ajuda!!!
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